创建和执行简单的命令

适用于：Access 2013、Office 2013

以下代码演示使用 Command 对象针对数据源执行命令的基本方法，尽管这不是 Command 对象的典型用法。 在这种情况下，它是返回行的命令，因此它将命令的执行结果返回到 Recordset 对象中。

 
 'BeginBasicCmd 
 On Error GoTo ErrHandler: 
 
 Dim objConn As New ADODB.Connection 
 Dim objCmd As New ADODB.Command 
 Dim objRs As New ADODB.Recordset 
 
 objCmd.CommandText = "SELECT OrderID, OrderDate, " & _ 
 "RequiredDate, ShippedDate " & _ 
 "FROM Orders " & _ 
 "WHERE CustomerID = 'ALFKI' " & _ 
 "ORDER BY OrderID" 
 objCmd.CommandType = adCmdText 
 
 ' Connect to the data source. 
 Set objConn = GetNewConnection 
 objCmd.ActiveConnection = objConn 
 
 ' Execute once and display... 
 Set objRs = objCmd.Execute 
 
 Debug.Print "ALFKI" 
 Do While Not objRs.EOF 
 Debug.Print vbTab & objRs(0) & vbTab & objRs(1) & vbTab & _ 
 objRs(2) & vbTab & objRs(3) 
 objRs.MoveNext 
 Loop 
 
 'clean up 
 objRs.Close 
 objConn.Close 
 Set objRs = Nothing 
 Set objConn = Nothing 
 Set objCmd = Nothing 
 Exit Sub 
 
ErrHandler: 
 'clean up 
 If objRs.State = adStateOpen Then 
 objRs.Close 
 End If 
 
 If objConn.State = adStateOpen Then 
 objConn.Close 
 End If 
 
 Set objRs = Nothing 
 Set objConn = Nothing 
 Set objCmd = Nothing 
 
 If Err <> 0 Then 
 MsgBox Err.Source & "-->" & Err.Description, , "Error" 
 End If 
'EndBasicCmd 

可以用 CommandText 属性指定要执行的命令。

 
'BeginNewConnection 
Private Function GetNewConnection() As ADODB.Connection 
 Dim oCn As New ADODB.Connection 
 Dim sCnStr As String 
 
 sCnStr = "Provider='SQLOLEDB';Data Source='MySqlServer';" & _ 
 "Integrated Security='SSPI';Database='Northwind';" 
 oCn.Open sCnStr 
 
 If oCn.State = adStateOpen Then 
 Set GetNewConnection = oCn 
 End If 
 
End Function 
'EndNewConnection